Preheat the oven to 350F. Spread cherry tomatoes on a baking sheet and drizzle with 1 tablespoon of olive oil. Bake for 20 minutes, or until skin starts to wrinkle.Cut mushrooms into small pieces and sauté with olive oil over medium-high heat.Separate egg whites from yolks. Mix 1 tablespoon of sour cream with the egg whites.Take a small baking dish and add one tablespoon of butter to it. Place it inside of an oven for a minute, or until the butter melts.Once the butter has melted, pour egg white mixture and fried mushrooms into the dish, and then add the yolks on top. Sprinkle with salt and pepper and bake for 10-15 minutes. Serve with tomatoes on the side.